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Online since: June 2024
Authors: Matthew R. Barnett, Daniel Fabijanic, Mohammad Navazani, Sitarama Raju Kada
Introduction High-entropy alloys (HEAs) are promising candidate alloys for applications requiring unique combinations of diverse properties which are more located at the middle of multi component phase diagrams instead of the corners [1].
The simultaneous actions of these two elements serves as a breeding ground to optimize the structure and relevant properties.
Repeatability and ease of estimating properties via simple proposed models helps raise the possibility of producing reliable predictable new alloys.
Elemental partitioning is an important factor affecting the bulk properties of an alloy.
Also, segregation of such low melting temperature phase can negatively affect mechanical performance of an alloy in high temperatures.
Online since: July 2014
Authors: S. Suresh, A. Dominic, V.S. Devah Dhanush, J. Sarangan
The lower boundary layer was affected more significantly than the upper boundary layer for APG but the effect was almost similar for FPG.
Pressure Drop and Friction factor The Figs. 3 and 4 show the variation of apparent pressure drop and apparent friction factor of DSM channels and SM channels as a function of Reynolds Number.
This was due to an increase in physical properties of nanofluids over DI water.
This increase in friction factor led to an increase in heat transfer rate in the turbulent regime.
· Pressure drop and friction factor of DSM channel was 17% to 23% lesser than SM channel
Online since: December 2014
Authors: Rupinder Singh, Inderpreet Singh Ahuja, Rajesh Kumar
With the help of Post curing, shell Mold temperature was not found to affect the dimensional accuracy of the castings, significantly.
The 3-D factor interaction graphs using RSM have been plotted to understand the influence of process parameters on response factors viz. dimensional accuracy in the form of average outer diameter (AOD).
The percentage errors between the predicted and experimentally observed values of response factors are within 5%.
Dev. 7.547E-004 Mean 1.69 C.V. 0.045 PRESS 4.564E-005 R-Squared 0.7965 Adj R-Squared 0.7633 Pred R-Squared 0.7036 Adeq Precision 20.189 For diagnose the statistical properties of the model by using the design expert can be analyzed by inspection of various plots.
The percentage errors between the predicted and experimentally observed values of response factors are within 5%.
Online since: March 2014
Authors: Daniel Maskell, Andrew Heath, Pete Walker
The properties of the geopolymer are highly dependent on many factors.
Varying mechanical properties are achieved with a kaolinite based lateritic soil that is mixed with an alkaline hydroxide that is set under different temperatures.
Table 1: Soil Properties (Maskell et al., 2012) Properties % Physical Properties Liquid Limit 24 Plasticity Index 8 Linear Shrinkage 6 Particle Grading Sand 33 Silt 46 Clay 16 Mineral Content Siderite 2 Hematite 3 Smectite 3 Chlorite 6 Illite 16 Kaolinite 31 Quartz 39 Elemental Composition (wt.)
Modern earth masonry : Structural properties and structural design.
Mechanism of geopolymerization and factors influencing its development: a review.
Online since: September 2014
Authors: Yi Wei Xu, Nan Ying Shentu, Quan Yuan Peng, Peng Hu, Qing Li
Shear Strength Monitoring System based on Measurement of Shear Wave Velocity and Moisture Content Peng Hu1,a, Qing li*1,b, Yiwei Xu1,c,Nanying Shentu1,d, Quanyuan Peng1,e 1College of Mechanical & Electrical Engineering, China Jiliang University, Hangzhou, 310018, China ahupengzhu@163.com, blq13306532957@163.com, c792370893@qq.com, dstnying_2@163.com, e280250370@qq.com *Corresponding author Keywords: Shear Strength; Shear Wave Velocity; Piezoelectric Bender Elements; Abstract.
China, with complex geological environment and concentrate precipitation, which result into frequent mudslide, suffers a great threaten to its people's lives and property safety.
Resonant column test is complex, and the factors that affect accuracy is too much.
Measurement of soil moisture content The density of soil changes along with the change of the moisture content of soil, so the shear strength of soil is also affected by the moisture content of soil.
Study on the Shear Wave Velocity Measurement from Bender Elements and Dynamic Properties of Saturated Soft Marine Clay.
Online since: September 2005
Authors: Dj. Koruga, B. Adnadjević, L. Matija, J. Jovanović
Koruga 3,d 1 Institute of Technical Sciences SASA, Belgrade, Serbia and Montenegro 2Faculty of Physical Chemistry, Belgrade, Serbia and Montenegro 3 Faculty of Mechanical Engineering, Belgrade, Serbia and Montenegro a matija@itn.sanu.ac.yu, bjelena@itn.sanu.ac.yu, cbora@ffh.bg.ac.yu, ddkoruga@mas.bg.ac.yu Keywords: Fullerol, Hydrogel, Interaction, Kinetic Parameters, Polyacrylic Acid.
One can expect that formed fullerol-hydrogel complex exhibits a new property, because fullerol possesses its own characteristic [OH]- groups, while hydrogels based on cross-linked poly(acrylic acid) have majority of carboxyl groups.
The basic physicochemical properties of the SAP PAA sample are as follows: apparent density of 0.78 kg/m3 and equilibrium swelling degree (SDeq) in distilled water at 298 K of 10000%.
From temperature dependence of 1k applying Arrhenius equation, activation energy and preexponent factor of the investigated binding process were determined (Table 1, columns 5 and 6).
Temperature, K 1k , min-1 maxx , % R (correlation coefficient) Ea, kJ/mol lnA 298 0.015 25.6 0.99 308 0.023 25.8 0.99 318 0.029 26.3 0.99 26.0 9.46 For the purpose of determination of a dominant process affecting the kinetics of interaction between fullerol and hydrogel, time dependence of fullerol binding degree was presented by equation (6) [15]: n i i tk ⋅=α 2 (6) where: 2k -constant of binding rate, and n -parameter indicative of interaction range.
Online since: February 2026
Authors: Vina Octavia Azzahra, Dwi Sapri Ramadhan, Safira Kanza, Dian Wardana, Rizal Mustofa
Design quality factors such as the number of replicates, control description, and statements on calibration or randomization were also extracted.
This finding supports the broader observation that UAHD affects extraction kinetics rather than end-point compositional profiles.
Particle-Size Reduction and Mechanical Comminution.
These factors act through physicochemical pathways, complementing mechanical disruption by altering phase equilibria, swelling behavior, and steam permeation.
Sheng, Application of steam explosion in oil extraction of camellia seed ( Camellia oleifera Abel) and evaluation of its physicochemical properties, fatty acid, and antioxidant activities, Food Sci Nutr, 7 (2019) 1004–1016
Online since: March 2010
Authors: Dun Wen Zuo, Xiang Feng Li, Yan Jiang, Jia Jing Yuan
Simulation Research on Elastic Constant and Natural Frequency of NCD Coated AFM Probes Yan Jiang1,a, Xiangfeng Li1,b, Dunwen Zuo1,c and Jiajing Yuan1,d 1 College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016 a Xiaodiandian-jy@126.com, bfxli@nuaa.edu.cn, cdzuo@jlonline.com, deragon_yuan@163.com Keywords: NCD, Simulation, AFM Probes, Elastic Constant, Natural Frequency Abstract.
Introduction Presently, the performance requirements of AFM probes mainly include [1-3] low elastic constant(10 -2~102N/m), high natural frequency(1~100KHz, for the contact-type AFM), high lateral stiffness and mechanical quality factor, mirror-smooth or electrode back of the cantilever, sharp-pointed tip and so on.
Due to the superiority properties of NCD(Nano-Crystalline Diamond) films, if we can deposit a layer of NCD film on the non-reflective surface of the probe, we will get a better wear resistance of the probe tip, at the same time guarantee a good surface quality.
Nonetheless, how the main mechanical parameters--elastic constant and natural frequency--are affected after depositing is not reported yet.
Online since: June 2010
Authors: Cheng Cheng Liu, Xi Zhong Yuan, Fei Liu, Wei Cui
Mechanical Behavior and Durability of Stabilized Soils Yuan Xizhong a, Liu Chengcheng b, Cui Wei c, and Liu Feid Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China axizhongyuan@163.com, blc165163450@163.com, ccuiwei750@sina.com,d 815705050@qq.com Keywords: Pavement; Soil improvement; Fly ash; Carbide lime; FGD gypsum; Strength; Durability.
This paper presents the results of a further systematic investigation on the mechanical behavior and durability of FA/CL/FGDG treated silt from Dezhou in Shandong province.
The chemical composition and physical properties of materials are given in reference [1].
In order to simulate the effect of moisture variation from wet-dry actions on the long-term mechanical behavior of stabilized soil, a new test methods was employed.
Variations in climatic conditions have been recognized by pavement engineers as a major factor affecting pavement long-term performance.
Online since: April 2014
Authors: Guo Yi Tang, Zhi Hao Zhang, Lei Guan, Yan Bin Jiang
However, HPDC products possess low mechanical properties resulting from a substantial number of porosity during die-filling and the solidification in the die cavity.
Heat treatments, involving solid solution and aging treatments, are commonly regarded as the effective methods for improving the mechanical properties of Mg alloys.
Numerous studies focused on the effect of the solid solution treatment or ageing on the microstructure and mechanical properties of the die-cast AZ91[4-6].
The microstructure and mechanical properties of the AZ91 alloy are greatly dependent of the competitive behavior between precipitation of β- Mg17Al12 phase and recrystallization of α-Mg matrix.
All of the above changes in the factors facilitate the formation of recrystallization nuclei of α-Mg matrix.
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